In a jar with a lid or a small bowl, combine all of the ingredients for the lemon vinaigrette. Shake or whisk together until well combined.
Add the chickpeas, cucumber, tomatoes, peppers, red onion, and herbs into a large mixing bowl or salad bowl. Pour in the vinaigrette and stir everything together.
Add the cubes of feta to the salad and gently stir them in. Taste for seasoning and serve immediately.
Notes
Leftover chickpea salad will keep for 3-4 days in an airtight container in the fridge.